APA (7th ed.) Citation

Welles, S. (1943). The world of the four freedoms. Columbia University Press.

Chicago Style (17th ed.) Citation

Welles, Sumner. The World of the Four Freedoms. New York: Columbia University Press, 1943.

MLA (9th ed.) Citation

Welles, Sumner. The World of the Four Freedoms. Columbia University Press, 1943.